Flood 
To dream that you are in a flood indicates that you should let go of some sexual fantasies. If the flood is raging, then there are emotional concerns or problems that need to be dealt with. You have hidden your feelings and they are overwhelming you. The location of the flood can relate to the area of your life that is creating anxiety. This dream may also suggest that you are overwhelming other people with your strong ideas and orders.
To dream about floods ravaging a large area and bearing down on you represents illness, failure in business, or a terrible situation within your relationship or marriage.
To dream about a gentle flood suggests that your concerns about a particular situation will soon be washed away.
Delta
To dream of a delta indicates a small hurdle to overcome before releasing the pent-up energy of a past investment.
To dream that you are standing in water in the vicinity of a delta may indicate the need for a physical purging. Alternatively, you may need an emotional purging such as a session with a good counselor. The message from the unconscious is that once this release has taken place, the movement forward will be smooth and easy and an ocean of new life will open up before you.
Torrent
To dream of a torrent represents a startling dilemma.
Tsunami
To dream of a tsunami signals you're being easily overwhelmed by unresolved feelings. You may be experiencing sadness and emotional stress in your waking life.
Drowning
To dream that you are drowning suggests that your feelings are pressing down too hard on you and that something you buried long ago is awakening. You could be moving too fast if you are attempting to dig into your subconscious. Slow down. If you drown and die, this represents a passionate rejuvenation. If you survive, then a relationship you are having trouble in will make it through.
To dream about someone else drowning indicates that you are investing too much in some situation that you cannot control. This dream may also indicate that you have lost your individuality. You can't tell the difference between the different personas you wear.
To dream about rescuing someone from drowning suggests that you have dealt with some feelings and attributes that are represented by the person drowning.
Avalanche
To dream about an avalanche is a sign that you have strong pent-up feelings that are about to explode. In a general sense, an avalanche signifies the overall tensions and burdens of life.
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